Quoted: What is this about drying out a chamber. I was braking my rifle in and was cleaning ALOT. Need alittle more info.
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What Corvette is referring to is that "tight-chambered" rifles can create overpressure IF the chamber has been well/over lubricated (note: more than likely from cleaning/lubrication of the bore and that lube being present on the walls of the chamber as a result).
As ignition of the round occurs, the walls of the brass expand to limits of the chamber, should the chamber have an overabundance of lubrication present this "could" possibly limit the complete expansion of the brass and as a result create over-pressure, popping the primer.
FWIW, as alot of our custom rifles have extremely tight chambers, this is not something I've ever experienced, but it could happen, especially if the chamber or headspace on your rifle happens to be out of spec, which is more likely IMO.
I'd do what it appears you have done and contact DPMS, let them check it out, as these are a relatively new products and there's always the possibilty the headspacing or chamber is too tight.
Mike